Designer: Jochen Bertholdt
Historic airmail transport - Germany / Federal Republic of Germany 1991 - 50 Pfennig
Theme: Post & Philately
| Country | Germany / Federal Republic of Germany |
| Issue Date | 1991 |
| Face Value | 50.00 |
| Color | blue |
| Perforation | K 14 |
| Printing Type | Multi-color rotogravure |
| Stamp Type | Postage stamp |
| Item Type | Stamp |
| Chronological Issue Number | 1396 |
| Chronological Chapter | GER-BRD |
| SID | 74083 |
| In 51 Wishlists | |
In 1909 Hans Grade built his famous "Grade monoplane". The span of the aircraft measured 10 m, the payload was 60 kg, the top speed 70 km / h. The drive was an air-cooled, stationary V-four-cylinder two-stroke engine with 12 kW continuous power. The hull was designed as an open framework of steel tube with wire bracing. The structure consisted as a tense high-decker from three longitudinal beams made of bamboo, taken in the vicinity of the hull of steel pipes.
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In 1909 Hans Grade built his famous "Grade monoplane". The span of the aircraft measured 10 m, the payload was 60 kg, the top speed 70 km / h. The drive was an air-cooled, stationary V-four-cylinder two-stroke engine with 12 kW continuous power. The hull was designed as an open framework of steel tube with wire bracing. The structure consisted as a tense high-decker from three longitudinal beams made of bamboo, taken in the vicinity of the hull of steel pipes..